code: def dash_thread_server() -> ThreadedRunner:
      """Start a local dash server in a new thread."""
      with ThreadedRunner() as starter:
          yield starter
  
file_path: dash/dash/testing/plugin.py
imports: import pytest
  from .consts import SELENIUM_GRID_DEFAULT
label_desc: Use image node_id 4 for calling a global function with example usage: dash_thread_server() without return types